By far one of the most frustrating things I've ever tried to do is to get my DHT22 sensor to display on anything! I've tried at least 4 different tutorials using different platforms. They all fail in one form or another. This one looked easy, but it also fails! I've installed, re-installed, read the readme's, whatever you can think of. Can you help? I'm running an RPi 2 Model B v1.1. Here's a screen shot of the result of running "the sudo npm install -g node-dht-sensor" command.